Identification of precipitate phases in a mechanically alloyed rapidly solidified Al-Fe-Ce alloy

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Metallurgical Transactions, A

OSTI ID:250730

Oevecoglu, M L ^[1]; Suryanarayana, C ^[2]; Nix, W D ^[3]

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1. Istanbul Technical Univ. (Turkey). Dept. of Metallurgical Engineering
2. Univ. of Idaho, Moscow, ID (United States). Inst. for Materials and Advanced Processes
3. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering

The stable and metastable precipitate phases which form during mechanical alloying of a rapidly solidified (RS) Al-8.4Fe-3.4Ce alloy have been unambiguously identified using X-ray diffraction, transmission electron microscopy (TEM), and energy dispersive spectroscopy techniques. The metastable Al{sub 10}Fe{sub 2}Ce and stable Al{sub 13}Fe{sub 3}Ce and Al{sub 13}Fe{sub 4} intermetallic phases, with crystal structures and lattice parameters as reported in the literature, have been identified. It is shown that the metastable Al{sub 10}Fe{sub 2}Ce intermetallic phase particles have elongated shapes and their sizes range between 100 and 200 nm and are free of any localized faults, whereas the equilibrium Al{sub 13}Fe{sub 3}Ce and Al{sub 13}Fe{sub 4} intermetallic phases are equiaxed in shape and have particle sizes ranging from 200 to 500 nm. It is suggested that the presence of the metastable Al{sub 10}Fe{sub 2}Ce in this material is due to its incomplete transformation to the equilibrium Al{sub 13}Fe{sub 3}Ce phase.

• OSTI ID: 250730
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 4 Vol. 27; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM BASE ALLOYS
CERIUM ALLOYS
HOT PRESSING
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MATERIALS
MILLING
PHASE STUDIES
POWDERS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY